Two novel nonlinear companding schemes with iterative receiver to reduce PAPR in multi-carrier modulation systems [PDF]
, 2006 Companding transform is an efficient and simple method to reduce the Peak-to-Average Power Ratio (PAPR) for Multi-Carrier Modulation (MCM) systems.
Guo, P, Jiang, T, Qu, D, Song, Y, Yao, W
core +1 more source
A Simple Nonlinear Companding Transfrom for Nonlinear Compensation of Direct-Detection Optical OFDM Systems [PDF]
International Journal of Electronics and Telecommunications, 2020 In direct-detection OFDM systems, the nonlinear effects caused by optical modulation and fiber transmission can degrade the system performance severely.
Trang T. Ngo, Nhan D. Nguyen
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Low complexity hybrid SLM for PAPR mitigation for ACO OFDM
ICT Express, 2022 The high peak to average power ratio (PAPR) is the main challenge facing asymmetrically clipped optical (ACO) orthogonal frequency division multiplexing (OFDM).
Roland Niwareeba +2 more
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1 V CMOS subthreshold log domain PDM [PDF]
, 2003 A new CMOS circuit strategy for very low-voltage Pulse-Duration Modulators (PDM) is proposed. Optimization of voltage supply scaling below the sum of threshold voltages is based on Instantaneous Log Companding processing through the MOSFET operating in ...
Huertas Díaz, José Luis +1 more
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On the selection of the best companding technique for PAPR reduction in OFDM systems
Journal of Information and Telecommunication, 2019 Orthogonal frequency division multiplexing (OFDM) is used in high data rate applications due to its ability to cope with frequency-selective channels. However, OFDM suffers from the high peak-to-average power ratio (PAPR) problem, which reduces the power
Mohamed Mounir, Mohamed Bakry El_Mashade
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Entropy Density and Mismatch in High-Rate Scalar Quantization with Renyi Entropy Constraint [PDF]
, 2012 Properties of scalar quantization with $r$th power distortion and constrained R\'enyi entropy of order $\alpha\in (0,1)$ are investigated. For an asymptotically (high-rate) optimal sequence of quantizers, the contribution to the R\'enyi entropy due to ...
Kreitmeier, Wolfgang, Linder, Tamas
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Journal of Cachexia, Sarcopenia and Muscle, Volume 11, Issue 5, Page 1291-1305, October 2020., 2020 Background Impaired muscle regeneration and increased muscle fibrosis are observed in aged muscle accompanied by progressive loss of muscle mass (sarcopenia). However, the underlying mechanism is still unclear. Methods The differentiated expressed genes in young and aged muscles after acute injury by cardiotoxin were identified by RNA‐sequence analysis.
Congcong Zhang +7 more
wiley +1 more source
Throughput-Distortion Computation Of Generic Matrix Multiplication: Toward A Computation Channel For Digital Signal Processing Systems [PDF]
, 2011 The generic matrix multiply (GEMM) function is the core element of high-performance linear algebra libraries used in many computationally-demanding digital signal processing (DSP) systems.
Anastasia, Davide, Andreopoulos, Yiannis
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Performance improvement of a SOA-based coherent optical-OFDM transmission system via nonlinear companding transforms [PDF]
, 2015 International audienceCoherent-Optical OFDM systems are known to be sensitive to large peak-to-average power ratio (PAPR) at the transmitter output, due to nonlinear properties of some components involved in the transmission link.
Azou, Stéphane +3 more
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Advances in Electrical and Computer Engineering, 2010 In this article DPCM (Differential Pulse Code Modulation) speech coding scheme with a simple switched first order predictor is presented. Adaptation of the quantizer to the signal variance is performed for each particular frame. Each frame is classified
VELIMIROVIC, L. +3 more
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